Peds calculation

Determine kg 176 lb / 2.2 lb/kg = 80 kg. Lbs cancel out.

Next

To determine ml / hr:

250 ml

------ X

400 mg

1 mg

----- X

1000 mcg

3 mcg / kg / min X

80 kg X

60 min / 1 hr =

9 ml / hr

Write this whole equation out then cancel out the units to get ml/hr.

NOte 1 mg = 1000 mcg

60 min = 1 hour

and

2.2 lbs = 1 kg

Determine kg 176 lb / 2.2 lb/kg = 80 kg. Lbs cancel out.

Next

To determine ml / hr:

250 ml

------ X

400 mg

1 mg

----- X

1000 mcg

3 mcg / kg / min X

80 kg X

60 min / 1 hr =

9 ml / hr

Write this whole equation out then cancel out the units to get ml/hr.

NOte 1 mg = 1000 mcg

60 min = 1 hour

and

2.2 lbs = 1 kg

I still don't understand how you get 9ml/hr

I still don't understand how you get 9ml/hr

I guess I need to brush up on med calculation because I got 6mL and here is how:

1lb=2.2kg 176lb/2.2=80kg

Order: 2mcg/kg/min

Supply: 400mg/250mL

80kg x 2mcg/kg/min= 160mcg/min

1mg=1000mcg

400,000mcg x 160mcg/min

------------ ------------

250mL x (mL)

x=0.1ml/min 1hr=60min

0.1ml x 60 = 6mL/hr

Sorry I accidentally used 3 mcg instead of 2 mcg. This message setup doesn't lend itself well to mathematical formulas.

to be honest, i still don't understand how you guys got those answers.

Same here. I have a hard time in calculations specially when it needs some conversions.I am trying to understand this.

http://www.alysion.org/dimensional/daexamples.htm

This link may help. What I have found is that many nursing instructors have different ways of setting up problems or with wording, but they are asking you to solve for the same thing. Practice each step and find out what you are solving for. There are certain types of problems that I have had to practice several times before it clicked for me. Once you figure out what it is that you are solving for, it is so much easier. Break the problem up. I know it is confusing, but I hope this helps. I do not use dimensional but by looking at the problems on this link, I was able to figure out what I was solving for.

http://www.alysion.org/dimensional/analysis.htm#problems

Oops. More practice problems with answers, just keep paging down till you find what you need.

check out the student forums (assistance forum) as there are a couple of maths threads which should help you work things out

I suggest you visit the nursing student assistance forum then go to drug calculations under the STICKY thread .. there you will find several pedia and adult drug computations.